I tried switching mine to a scheduled feeding when Pete first developed urinary tract problems. Not happy cats! Didn't work at all. I had a kitty rebellion on my hands! Now they all eat the prescription food that Pete needs. Cost is similar to a high end kibble anyway. The only time they can't eat it is when Pete needed Hill's S/D formula. It's not safe for any cat to eat long term. Pete needed it for a couple weeks only. All of the other prescription urinary health formulas are safe for any adult cat.

Increase her water intake any way you can. It will help flush out her bladder and reduce the crystals. My cats like moving water so they have two fountains--the rejected the actual cat fountain and prefer two decorative ones I have in the living room! If she likes canned food, give her lots. The prescription food likely has a canned formula.

Good luck. Hope Snoopy is feeling better soon.